SU1399083A2 - Arrangement for grinding and polishing the surfaces of bodies of rotation of variable curvature - Google Patents

Abstract

The invention relates to the abrasive machining of large-sized shaped bodies while:; en. The aim of the invention is to improve the productivity and quality of processing. The device consists of a column 1, on which mount С /) СО со со О СХ) со N)

Description

phage 1

at the same time, the shafts / b and l in the carriage b are mounted on rolling bearings. Since with this arrangement the electrical signals of the agricultural sensor1., Transmitting 1.1E to the agricultural receiver 44 are distributed. The curvature sensors

1399083

caliper 2. To the last m - with the insertion drive, the horizontal traverse of the position of the eccentric bushing 5, on which the carriage 6 is mounted, is attached to the eccentric. Processing - Pr to pr prcr h pprnrshrn with the help of sha- rmpp and prlie 48 establish cd f / g / lp

1399083

g of the processed section of the profile nj, LIA may have another design, directly measuring the curvature of the product in the place where the moment is being processed. The design described above is only one of the possible embodiments of the sensor. Device on PP. 1 and 3, it is possible that the kinematic connection of the central gears of the differential with the eccentric and eccentric bushing is made in the form of rigidly connected with their shafts

 45

g

T (

J /

SS)

.line profile of the surface to be treated.

When the abrasive tool is moving along the forming rotating product, the grinding is performed in rows. When turning on the drive rotation of the eccentric 17 last, rotate

1399083

; i.i / i of the connection with the eccentric bushing and with the central gear, are connected to each other through an intermediate gear, the axis of which is pivotally connected to one-armed arms with hinged second ends on the wa

27

FIG. 6

32

J4

FIG. 7

MF

FIG d

Editor I. Gorvat

Compiled by A. Shutov

Tehred A. Kravchuk Proofreader m. Pojo

Order 2627/16 Circulation 678 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing-printing enterprise, Uzhgorod, st. Project, 4

Widz

FIG. 9

SU 1399084A1 Batch: N0023010

Date: 18/08/2000

Number of pages: 4

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union of soviet

SOCIALIST

REPUBLIC

USSR STATE COMMITTEE FOR INVENTIONS AND OPENINGS

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE

(21) 4123074 / 31-08

(22) 2A.09.86

(46) 05/30/88. Bul No. 20 (72) I.P. Filonov, S.M. Arinkin, V.V. Peskov and L.F. Bezhelev (53) 621.923.9 (088.8)

56) Semibratov M.N. Tekhiolot and processing of optical parts. M.: Ashi nostroenne, 1975, p. 42-47, Figure 15.

(54) METHOD OF INSTALLATION OF SPHERICALS X PARTS

(57) The invention relates to the machining of spherical surfaces of optical and other parts and can be used in the manufacture of lenses of large diameters, as well as ball boards and segments in

1399084 A1

(51) 4V 24 R 11/00

various branches of the national economy. The aim of the invention is to improve the accuracy of installation of large-sized spherical parts by detecting physical points on the workpiece, falling from the theoretical surface. The part is set at an angle of 7–15 to the horizon, a point is determined on the untreated surface, the maximum beats, ala} and y from the horizontal plane, and the point equidistant from the diameter circle, then a spherical surface is formed in the area of the detected points which these points align by moving the part by an angle equal to the arc of a circle between them. 2 Il.

oo os from about 00

four

The invention relates to the mechanical processing of the spherical surfaces of optical and other parts and can be used in optical instrument making in the manufacture of lenses of large diameters, as well as ball boards and segments in other sectors of the national economy.

The purpose of the invention is to improve the accuracy of installation of large-sized spherical parts by detecting material points on the workpiece, coinciding with the theoretical surface.

FIG. 1 is a schematic diagram of the spherical metal installation method; FIG. na figure 2 - the same view in the plan

The method is carried out as follows.

The point of contact of the horizontal plane with the spherical surface of the workpiece 1 (Figures 1 and 2), for example, from a shop gantry crane is determined.

Through point a, several traces of verticals (not shown) are carried out (within angles: -a 360), for example, marking projections of a thread with a load hanging freely, passing through a. The desired center of the spherical surface is located on the continuation of the traces of these verticals.

On one of these tracks, a center of a circle with a diameter d is located and the distance h between the plane of this circle and the gap between it and the spherical surface (the height of the segment) is measured. This operation is easy to implement with a tool that is a circle with diameter d cut out of a plane and connected with it evenly around the circumference with the help of springs. An indicator for measurement is set between the main plane and the plane of this circle. Measuring with such a tool is that it is applied to a spherical surface, touched by its entire circle with diameter d, and the value of h is fixed. Thus, the value of the latter in relation to the values of d, h and R. (radius of the sphere) is determined. The different positions of such an instrument.

The relationship between the values of d, h and Rp is determined by considering the triangle from (Fig. 1) from which it follows that (1 tc - 2F (-cos | 3 and tc h7cos / 3, traces t (m1no,

R, - g - cos ft with 2cos p

 Mf

R,

4Br + d 8h

(one)

Thus, using the known d and h dependences (1), it is possible to determine the value of the radius R of the workpiece and determine its deviation from sphericity at any point on the surface. Dependences (1) and the same method is used to determine the position on the spherical surface of the point b (Fig. 1 and 2) equidistant from the circumference of the diametral plane of the workpiece 1, and the angle od of inclination of this plane to the horizon, for which the angle D mchs corresponding to the maximum diameter dd is determined

if, according to the formula

sin vg (R, - h,) 2 + (4) 2

, -ABOUT

 2R7

f-

find the length of the arc 5 (RS,) and set the length of the arc on one of the tracks (verticals) from the point 0 | located in the plane of the base,

determine the length s of the arc ab on the sphere connecting the points a and b, then using the formula s / R, where R is the arithmetic average (quadratic) radius of the workpiece, determine the angle of deviation of the plane of the circle of the diameter of the workpiece from the horizontal (Fig. ), determine the position in the horizontal plane of the projection of the arc S between the points a and b (the position of the plane oab in Figures 1 and 2) relative to some fixed coordinate system XYZ. For this purpose, an axis, for example, in the coordinate system associated with the workpiece, is positioned in a plane coinciding with the track on which the arc ab is located. Then the angle jj is laid out from this axis and the position of the Y axis of the coordinate system (fixed) associated with the base on which the workpiece is located is marked.

Thus, they are found to be oni.-c-divided in space by the position of the found points a and b of the spherical surface relative to two coordinate systems. The combination of these points means (as can be seen from figures 1 and 2) equality

ab s

4+ Yi

ABOUT,

those. the combination of the origin of the systems XYZ and xy and their relative rotation at an angle y.

After the vertex of the workpiece is located at the point as far as possible from the horizontal plane of the base, the area of the sphere wedge is treated with a tool based on fixed guides equidistant to treat a spherical surface.

After processing the spherical surface in the apex zone, if necessary, repeated measurements are carried out in the described sequence. This need may be at large deviations of the workpiece sphere radius from the required one, for example, when it is produced by casting into the ground. After the secondary alignment of points a and b

Machining is carried out when basing the tool on the machined surface with circular and radial feeds of the tool making a complex motion: rotational relative to its own axis of symmetry and rotating with this axis.

invention formula

The method of installation of spherical parts, in which they find the vertex of a spherical surface and combine it with the axis of symmetry of the part, which differs from the fact that, in order to improve the accuracy of the installation of large-sized parts,

20

The bone of the part is set at an angle of 7-15 ° to the horizon, a point on the surface that is as far as possible from the horizontal plane and a point equidistant from the diameter circle are located on the surface, after which they form a spherical area in the zone of detected points, and the combination of these points is carried out moving the part by the arc of a circle lying on the formed area between the top

spherical surface and point

as far from the horizontal plane as possible.

fig 2

Claims (1)

10 claims The method of installation of spherical parts, in which the top of the spherical surface is found and 15 is combined with the axis of symmetry of the part, characterized in that, in order to increase the accuracy of installation of large-sized details, the diametrical plane of the part is set at an angle of 20 7-15 ° to the horizon, find on the surface, a point as far as possible from the horizontal plane, and a point equidistant from the diametrical circle, after which a spherical area is formed in the area of the identified 25 points, and the combination of these points is carried out by remescheniem details on the value of a circular arc lying on the site formed between the apex of the spherical surface 30 and the point most distant from the horizontal plane. 1 399084